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step 1 22 lb
step 2 - short bolts add 55 degrees - medium bolts add 65 degrees - long bolts add 75 degrees These are torque to yield and are recommended to be replaced when servicing..
99 chevy malibu v6 3.1 engine, head bolt torque is-- 98 through 2001 is step1- 37 foot lbs, step 2- rotate an additional 90 degrees (1/4 turn). the rocker arm bolts are 168-in. lbs.
When torquing items today very little is done with just "numbers" in the process. Now you have to have an angle meter to complete the process so when you see me say to torque a specific number "plus so many degrees", this is how it's done. This is the meter:
Now, Here are the specs for installing the head:
Cylinder Head Bolt
First Pass
30 N·m
22 lb ft
Final Pass
155 degrees
Here is the sequence shown in picture form:
Also, you will need to discard the old bolts because they are "torque to yeild" bolts and CANNOT be reused. The reason: "Torque to yeild" bolts actually stretch during the torque process and once they've gone through this process they can't be reused because they no longer are able to "clamp" the head because they are too long. Hope this helps your repair project.
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